here are a few good examples (imho)
podcast 005 would = "thats what she said" (cause its funny, and the first time you had that part in the show)
podcast 006 would = "Amelie m'a dit ..." (cause u had an interview with amelie, and it is kinda funny cause it is also the name of a song, get it
)
these are bad examples, but you get the idea. they can be anything you want really, i have a feeling you will be really good at this kind of thing
i can also start taking the little pre-hash you do at the beginning of each show and use that as the description for itunes.